Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes (Textual) [Abstract]
U.S. statutory rate	35.00%
Tax effected in state net operating loss carryforwards	$ 6.1	$ 6.5
Tax effected in foreign net operating loss carryforwards	22.2	35.8
Maturity period of state and foreign net operating loss carryforwards	2014
Future foreign taxable income	86.6
U.S. federal income	80.8
U.S. taxable income	55.2	156.5
Unrecognized tax benefits	5.9
Interest and penalties in income tax expenses	$ 0.1